Mounds originating from wind-blown sediment accumulation beneath vegetation (nebkhas) often indicate land degradation in dry areas. Thus far, most nebkha research has focused on individual plants. Here, we aimed to explore population-scale processes (up to scales of about 100 m) that might explain an observed nebkha landscape pattern. We mapped the Rhazya… (More)

Dimensional analysis was used to develop a new mathematical model that can describe head loss across sand filters for microirrigation using parameters that are easy to estimate. The developed model was compared with others previously developed. The study revealed that the new mathematical model had an adjusted coefficient of determination of 0.995 with no… (More)